Home / 13,517.11-18,653.59-7,548.78

Finding the Fourth Proportional to 13,517.11, 18,653.59 and 7,548.78

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Solution

The fourth proportional to 13,517.11, 18,653.59 and 7,548.78 is: 10,417.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,517.11 : 18,653.59 = 7,548.78 : x
  2. Step 2: Convert to fraction form
    13,517.11/18,653.59 = 7,548.78/x
  3. Step 3: Cross multiply
    13,517.11x = 18,653.59 × 7,548.78
  4. Step 4: Simplify right side
    13,517.11x = 140,811,847.12
  5. Step 5: Solve for x
    x = 140,811,847.12/13,517.11
  6. Step 6: Final answer
    x = 10,417.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.